#!/bin/sh
#
### BEGIN INIT INFO
# Provides:          opensips
# Required-Start:    $syslog $network $local_fs $time $remote_fs
# Required-Stop:     $syslog $network $local_fs $remote_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Start the OpenSIPS SIP server
# Description:       Start the OpenSIPS SIP server
### END INIT INFO
#
# TODO:
# The following fields should be added (and completed):
# Should-Start:      postgresql mysql radius
# Should-Stop:       postgresql mysql radius

set -e

PATH_EXTRA=
PATH=/sbin:/bin:/usr/sbin:/usr/bin${PATH_EXTRA:+:${PATH_EXTRA}}
DAEMON=/sbin/opensips
NAME=opensips
DESC=opensips
CFGFILE=/etc/opensips/opensips.cfg
M4CFGFILE=/etc/opensips/opensips.m4
M4ARCHIVEDIR=/etc/opensips/archive
HOMEDIR=/run/opensips
PIDFILE=$HOMEDIR/$NAME.pid
DEFAULTS=/etc/default/opensips
RUN_OPENSIPS=no


[ -e "/lib/lsb/init-functions" ] && . /lib/lsb/init-functions
test -f $DAEMON || exit 0

# Load startup options if available
if [ -f $DEFAULTS ]; then
   . $DEFAULTS || true
fi

if [ "$RUN_OPENSIPS" != "yes" ]; then
    echo "OpenSIPS not yet configured. Edit /etc/default/opensips first."
    exit 0
fi


check_opensips_config ()
{
	# Check if opensips configuration is valid before starting the server
	set +e
	out=$($DAEMON -c -f $CFGFILE 2>&1 > /dev/null)
	retcode=$?
	set -e
	if [ "$retcode" != '0' ]; then
	    echo "Not starting $DESC: invalid configuration file!"
	    echo -e "\n$out\n"
	    exit 1
	fi
}

create_radius_seqfile ()
{
    # Create a radius sequence file to be used by the radius client if
    # radius accounting is enabled. This is needed to avoid any issue
    # with the file not being writable if opensips first starts as user
    # root because DUMP_CORE is enabled and creates this file as user
    # root and then later it switches back to user opensips and cannot
    # write to the file. If the file exists before opensips starts, it
    # won't change it's ownership and will be writable for both root
    # and opensips, no matter what options are chosen at install time
    RADIUS_SEQ_FILE=/run/opensips/opensips_radius.seq
    if [ -d /run/opensips ]; then
	chown ${USER}:${GROUP} /run/opensips

	if [ ! -f $RADIUS_SEQ_FILE ]; then
	    touch $RADIUS_SEQ_FILE
	fi

	chown ${USER}:${GROUP} $RADIUS_SEQ_FILE
	chmod 660 $RADIUS_SEQ_FILE
    fi
}


S_MEMORY=$((`echo $S_MEMORY | sed -e 's/[^0-9]//g'`))
P_MEMORY=$((`echo $P_MEMORY | sed -e 's/[^0-9]//g'`))
[ -z "$USER" ]  && USER=opensips
[ -z "$GROUP" ] && GROUP=opensips
[ $S_MEMORY -le 0 ] && S_MEMORY=32
[ $P_MEMORY -le 0 ] && P_MEMORY=32

if test "$DUMP_CORE" = "yes" ; then
    # set proper ulimit
    ulimit -c unlimited
    
    # directory for the core dump files
    # COREDIR=/home/corefiles
    # [ -d $COREDIR ] || mkdir $COREDIR
    # chmod 777 $COREDIR
    # echo "$COREDIR/core.%e.sig%s.%p" > /proc/sys/kernel/core_pattern
fi

OPTIONS="-P $PIDFILE -m $S_MEMORY -M $P_MEMORY -u $USER -g $GROUP -f $CFGFILE"

case "$1" in
  start)
	check_opensips_config
	create_radius_seqfile

	# dirs under /run will go away on reboot.
	mkdir -p "$HOMEDIR"
	chmod 775 "$HOMEDIR"
	chown "$USER:$GROUP" "$HOMEDIR" >/dev/null 2>&1 || true

	# Generate config from M4
	if [ -f $M4CFGFILE ]; then
		m4 -Q $M4CFGFILE >$CFGFILE.tmp
		if [ $? != 0 ]; then
			echo "Cannot process m4 macro"
			rm "$CFGFILE.tmp"
			exit 1
		fi

		[ -e $CFGFILE ] || touch $CFGFILE

		# compare configs
		if [ `md5sum $CFGFILE|awk '{print $1}'` != `md5sum $CFGFILE.tmp|awk '{print $1}'` ]; then
			mkdir -p "$M4ARCHIVEDIR"
			mv "$CFGFILE" "$M4ARCHIVEDIR/$NAME.cfg-`date +%Y%m%d_%H%M%S`"
		fi


		mv "$CFGFILE.tmp" "$CFGFILE"
		chown $USER:$GROUP $CFGFILE
		chmod 640 $CFGFILE
	fi

	log_daemon_msg "Starting $DESC" "$NAME"
	start-stop-daemon --start --quiet --pidfile $PIDFILE \
		--exec $DAEMON -- $OPTIONS || echo -n " already running"
	log_end_msg $?
	;;
  stop)
	log_daemon_msg "Stopping $DESC" "$NAME"
	start-stop-daemon --oknodo --stop --quiet --pidfile $PIDFILE \
		--exec $DAEMON
	log_end_msg $?
	;;
  restart|force-reload)
	check_opensips_config
	create_radius_seqfile

	log_daemon_msg "Restarting $DESC" "$NAME"
	start-stop-daemon --oknodo --stop --quiet --pidfile \
		$PIDFILE --exec $DAEMON
	sleep 1
	start-stop-daemon --start --quiet --pidfile \
		$PIDFILE --exec $DAEMON  -- $OPTIONS
	log_end_msg $?
	;;
  status)
	status_of_proc -p $PIDFILE "$DAEMON" "$NAME"
	;;
  *)
	N=/etc/init.d/$NAME
	echo "Usage: $N {start|stop|restart|force-reload|status}" >&2
	exit 1
	;;
esac

exit 0
